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is an ad network for Twitter. Which pays twitterers for posting ad tweets (they call it magpie-tweets) in between their regular tweets. Advertisers pay on a cost-per-thousand-impression basis, and the ads are promised to be delivered to relevant audiences based on keywords. That means Be-A-Magpie will analyze the content of your Twitter messages to see if there is a match to particular advertisers. Finally a way for you to start earning from your Twitter account. Also check Twittad and Twittertise.

A twitter ad network